This painting is depicting the Roman Senators who were very important political leader during the roman republic. Specifically Brutus is raising his knife to stab Julius ceasar, a threat to the Roman republic.
128 Bust of a Roman Popularis Politician Tiberius Gracchus (Ref No.
c. 1413-1415 - 'The Death of the Roman Consul Marcus Atilius Regulus' by Boucicaut Master (anonymous French or Flemish miniaturist and illuminator active between 1400 and 1430 in Paris. He worked in the International Gothic style) for Concerning the Fates of Illustrious Men and Women by Giovanni Boccaccio (Italian, Certaldo, 1313-1375).
Mago Barca was the youngest of Hannibal's brothers. He became an expert in setting up ambushes and was instrumental in Hannibal's victory over the Roman Consul Tiberius Sempronius Longus in December of 218 B.C. He died of wounds suffered in battle toward the end of the Second Punic War.